Let's divide 21920 by 9
We're looking to find how many times 9 goes into 21920.

Advancing to step 1:
The number 9 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 9

On to step 2:
When dividing 21 by 9, we get 2 with a remainder of 3.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 18 from 21 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 9

Moving on to step 3:
When dividing 39 by 9, we get 4 with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 24.0
If we take 36 away from 39, we end up with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 9

Moving on to step 4:
9 goes into 32 3 times with a remainder of 5.
The next digit of our result is 3. 
Result so far: 243.0
Subtract 27 from 32 to get 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 9

Going ahead to step 5:
50 divided by 9 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 2435.0
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 6:
When dividing 50 by 9, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 2435.5
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
9 goes into 50 5 times with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 2435.55
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 2435.55, with a leftover of 0.005.